3.电信运营商客服电话
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication11
{
class Program
{
static void Main(string[] args)
{
Console.Write("请输入运营商客服电话");
string a = Console.ReadLine();
switch (a)
{
case "10000":
Console.WriteLine("中国电信");
break;
case "10010":
Console.WriteLine("中国联通");
break;
case "10086":
Console.WriteLine("中国移动");
break;
default:
Console.WriteLine("您输入有误");
break;
}
Console.ReadLine();
}
}
}